/* NISPS Immersive — Design A */
/* Full-viewport canvas with floating translucent overlays */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

:root {
  --glass-bg: rgba(13, 13, 13, 0.65);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 16px;
  --accent: #ff6a00;
  --accent-dim: rgba(255, 106, 0, 0.25);
  --danger: #ff4466;
  --text: #e0e0e0;
  --text-dim: #888;
  --radius: 12px;
  --radius-sm: 8px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #0d0d0d;
  color: var(--text);
  font-family: 'JetBrains Mono', 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 13px;
  touch-action: none;
  user-select: none;
  -webkit-user-select: none;
}

/* ---- Back button ---- */
.back-btn {
  position: fixed;
  top: 30px;
  left: 8px;
  z-index: 30;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border-radius: 6px;
  background: rgba(13, 13, 13, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
  text-decoration: none;
  line-height: 1;
  transition: all 0.15s;
}

.back-btn:hover, .back-btn:active {
  border-color: var(--accent);
  color: var(--accent);
}

/* ---- Fullscreen canvas ---- */
#vis-canvas,
#synth-vis-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
}

#synth-vis-canvas {
  display: none;
}

#synth-vis-canvas.active {
  display: block;
}

#vis-canvas.hidden-canvas {
  display: none;
}

/* ---- Glass mixin ---- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
}

/* ---- Heatmap strip (top) ---- */
.heatmap-strip {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 22px;
  z-index: 20;
  background: rgba(13, 13, 13, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: flex-end;
  padding: 2px 4px;
}

.heatmap-cells {
  display: flex;
  flex-direction: row;
  flex: 1;
  height: 16px;
  gap: 1px;
  border-radius: 3px;
  overflow: hidden;
  align-items: stretch;
}

.heatmap-cell {
  flex: 1;
  min-width: 0;
  position: relative;
  cursor: pointer;
  height: 16px;
  background: rgba(255, 255, 255, 0.04);
  overflow: hidden;
}

.heatmap-cell-bar {
  height: 100%;
  border-radius: 0 1px 1px 0;
  transition: width 0.15s;
}

.heatmap-cell:hover .heatmap-cell-bar {
  filter: brightness(1.3);
}

.heatmap-tooltip {
  position: fixed;
  top: 32px;
  padding: 4px 10px;
  background: rgba(0, 0, 0, 0.85);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  font-size: 12px;
  color: var(--text);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s;
  z-index: 25;
  white-space: nowrap;
}

.heatmap-tooltip.visible {
  opacity: 1;
}

/* ---- Floating joystick with integrated map ---- */
.joystick-container {
  position: fixed;
  bottom: 136px;
  left: 24px;
  width: 160px;
  height: 160px;
  z-index: 30;
  touch-action: none;
  border-radius: 50%;
}

#joy-map {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  cursor: grab;
  touch-action: none;
}

#joy-map:active {
  cursor: grabbing;
}

.joystick-glow {
  position: absolute;
  inset: -8px;
  border-radius: 50%;
  pointer-events: none;
  background: radial-gradient(circle, rgba(255,106,0,0.06) 0%, transparent 70%);
  z-index: -1;
}

/* Noise ring (RL exploration indicator) */
.noise-ring {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 0px solid rgba(255, 100, 50, 0.0);
  pointer-events: none;
  transition: border-width 0.3s, border-color 0.3s;
}

.noise-ring.active {
  border-width: 3px;
  border-color: rgba(255, 100, 50, 0.5);
}

.noise-ring.high {
  border-width: 6px;
  border-color: rgba(255, 60, 40, 0.6);
}

/* Follow badge near joystick */
.follow-badge {
  position: absolute;
  top: -24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 2px 10px;
  border-radius: 10px;
  background: rgba(255, 106, 0, 0.15);
  border: 1px solid rgba(255, 106, 0, 0.4);
  color: var(--accent);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  pointer-events: none;
  white-space: nowrap;
}

.follow-badge.hidden {
  display: none;
}

/* Joystick follow-mode pulsing border on canvas */
.joystick-container.follow-active #joy-map {
  box-shadow: 0 0 0 2px rgba(255, 106, 0, 0.5);
  animation: follow-pulse 1.5s ease-in-out infinite;
}

@keyframes follow-pulse {
  0%, 100% { box-shadow: 0 0 0 2px rgba(255, 106, 0, 0.3); }
  50% { box-shadow: 0 0 12px 3px rgba(255, 106, 0, 0.5); }
}

/* ---- RL floating buttons ---- */
.rl-buttons {
  position: fixed;
  bottom: 92px; /* just above 88px collapsed sheet */
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 32px;
  z-index: 45;
  transition: opacity 0.3s;
}

.rl-buttons.hidden {
  opacity: 0;
  pointer-events: none;
}

.rl-btn {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 2px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-top: 2px;
  gap: 0;
}

.rl-icon {
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
}

.key-num {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  font-family: inherit;
  line-height: 1;
  margin-top: -1px;
}

.rl-btn:active {
  transform: scale(0.9);
}

.rl-up {
  border-color: rgba(0, 200, 160, 0.4);
  color: #00c8a0;
  background: rgba(0, 200, 160, 0.08);
}

.rl-up:active {
  background: rgba(0, 200, 160, 0.2);
  box-shadow: 0 0 20px rgba(0, 200, 160, 0.3);
}

.rl-down {
  border-color: rgba(220, 60, 20, 0.4);
  color: #dc3c14;
  background: rgba(220, 60, 20, 0.08);
}

.rl-down:active {
  background: rgba(220, 60, 20, 0.2);
  box-shadow: 0 0 20px rgba(220, 60, 20, 0.3);
}

.rl-btn.flash {
  animation: rl-flash 0.25s ease-out;
}

@keyframes rl-flash {
  0% { transform: scale(1.15); }
  100% { transform: scale(1); }
}

/* ---- Floating mode bar (sticky inside sheet) ---- */
.floating-bar {
  position: sticky;
  top: 0;
  z-index: 45;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 6px 12px;
  background: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
}

/* Float button (randomize in floating bar) */
.float-btn {
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}

.float-btn:active {
  background: rgba(255, 106, 0, 0.15);
  color: var(--accent);
}

.follow-pill {
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
}

.follow-pill.active {
  background: rgba(255, 106, 0, 0.15);
  border-color: rgba(255, 106, 0, 0.4);
  color: var(--accent);
}

.chevron-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-dim);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.chevron-btn:active {
  background: rgba(255, 255, 255, 0.12);
}

.chevron-btn.open {
  transform: rotate(180deg);
}

/* ---- Bottom sheet ---- */
.bottom-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 40;
  background: rgba(13, 13, 13, 0.75);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--glass-border);
  border-radius: 0;
  transition: height 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  height: 88px;
  overflow: hidden;
  padding-bottom: var(--safe-bottom);
  will-change: height;
}

.bottom-sheet.expanded {
  height: 55vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

/* Sheet status line */
.sheet-status {
  padding: 8px 16px;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Sheet content */
.sheet-content {
  padding: 0 16px 16px;
}

/* Mode row */
.mode-row {
  display: flex;
  justify-content: center;
  margin-bottom: 12px;
}

/* Pill toggle */
.pill-toggle {
  display: inline-flex;
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.04);
}

.pill-opt {
  padding: 6px 18px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.pill-opt.active {
  background: var(--accent-dim);
  color: var(--accent);
  font-weight: 600;
}

/* Action buttons row */
.action-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 12px;
}

.action-btn {
  padding: 8px 16px;
  border-radius: 6px;
  border: 1px solid var(--glass-border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.15s;
  touch-action: manipulation;
}

.action-btn:active {
  transform: scale(0.95);
}

.action-btn.accent {
  border-color: rgba(255, 106, 0, 0.3);
  color: var(--accent);
  background: rgba(255, 106, 0, 0.08);
}

.action-btn.accent:active {
  background: rgba(255, 106, 0, 0.2);
}

.action-btn.dim {
  color: var(--text-dim);
  border-color: rgba(255, 255, 255, 0.05);
}

.action-btn.flash {
  animation: btn-flash 0.2s ease-out;
}

@keyframes btn-flash {
  0% { background: rgba(255, 106, 0, 0.3); }
  100% { background: rgba(255, 255, 255, 0.06); }
}

/* Preset row */
.preset-row {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 12px;
}

.preset-label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-right: 4px;
}

.preset-chip {
  padding: 4px 12px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-dim);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.15s;
  touch-action: manipulation;
}

.preset-chip:active {
  background: rgba(255, 106, 0, 0.15);
  color: var(--accent);
}

/* Synth panel */
.synth-panel {
  margin-bottom: 16px;
}

.synth-panel.hidden {
  display: none;
}

.synth-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
}

.synth-row label {
  font-size: 12px;
  color: var(--text-dim);
  min-width: 80px;
}

.synth-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  height: 4px;
}

.synth-row select {
  flex: 1;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
  color: var(--text);
  padding: 4px 8px;
  font-size: 12px;
}

.synth-status {
  font-size: 11px;
  color: var(--text-dim);
}

/* Loss section */
.loss-section {
  margin-bottom: 12px;
}

.loss-section label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: block;
  margin-bottom: 4px;
}

#loss-canvas {
  width: 100%;
  height: 80px;
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--glass-border);
}

/* Advanced section */
.advanced-section {
  margin-top: 8px;
}

.advanced-section summary {
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  padding: 6px 0;
}

.raw-params {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  max-height: 300px;
  overflow-y: auto;
  padding: 8px 0;
}

.raw-param {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
}

.raw-param-label {
  width: 70px;
  color: var(--text-dim);
  text-align: right;
  flex-shrink: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.raw-param input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  height: 3px;
}

.raw-param-val {
  width: 36px;
  color: var(--text-dim);
  text-align: left;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

/* ---- Synth quick controls (play button next to back) ---- */
.synth-quick-controls {
  position: fixed;
  top: 30px;
  left: 52px;
  z-index: 30;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0;
}

.play-btn {
  width: 36px;
  height: 36px;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(13, 13, 13, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, border-color 0.15s;
  padding: 0;
  flex-shrink: 0;
}

.play-btn:active {
  background: rgba(255, 255, 255, 0.12);
}

.play-btn.playing {
  border-color: rgba(255, 106, 0, 0.4);
  color: var(--accent);
  background: rgba(255, 106, 0, 0.12);
}

.play-drawer {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 18px;
  background: rgba(13, 13, 13, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  margin-left: 6px;
  height: auto;
  white-space: nowrap;
}

.play-drawer label {
  font-size: 11px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}

.play-drawer input[type="range"] {
  width: 80px;
  accent-color: var(--accent);
  height: 3px;
}

.play-drawer span {
  font-size: 10px;
  font-variant-numeric: tabular-nums;
  min-width: 24px;
  color: var(--text-dim);
}

.synth-quick-controls:hover .play-drawer,
.play-drawer.show {
  display: flex;
}

/* ---- Utility ---- */
.hidden {
  display: none !important;
}

/* ---- Scrollbar styling ---- */
.bottom-sheet::-webkit-scrollbar {
  width: 4px;
}

.bottom-sheet::-webkit-scrollbar-track {
  background: transparent;
}

.bottom-sheet::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
}

/* ---- Media queries ---- */
@media (min-width: 768px) {
  .joystick-container {
    width: 180px;
    height: 180px;
    bottom: 156px;
    left: 32px;
  }

  #joy-map {
    width: 180px;
    height: 180px;
  }

  .rl-buttons {
    bottom: 196px;
    gap: 32px;
  }

  .rl-btn {
    width: 72px;
    height: 72px;
    font-size: 32px;
  }
}

@media (min-width: 1024px) {
  .bottom-sheet {
    max-width: 600px;
    left: 50%;
    transform: translateX(-50%);
  }
}